* org-mobile.el (org-mobile-edit): DTRT when inserting a heading
in an invisible region.
* org.el (org-insert-heading-respect-content): New
`invisible-ok' parameter. Add docstring.
(org-insert-todo-heading-respect-content): Add docstring.
Thanks to James Harkins for the extra detailed reports and
the proposed solutions, both for org.el and org-mobile.el.